CARMA: Complete Autonomous Responsible Management Agent (System)

Transcription

1 University of Technology, Sydney Faculty of Engineering and Information Technology CARMA: Complete Autonomous Responsible Management Agent (System) Submitted by: Haydn Mearns BE (Soft.) 2012 Principal Supervisor: Adjunct Prof. John Leaney Co-supervisor: Emeritus Prof John Debenham Submitted for the degree of DOCTOR OF PHILOSOPHY

2 Certificate of Authorship/Originality I certify that the work in this thesis has not previously been submitted for a degree nor has it been submitted as part of requirements for a degree except as fully acknowledged within the text. I also certify that the thesis has been written by me. Any help that I have received in my research work and the preparation of the thesis itself has been acknowledged. In addition, I certify that all information sources and literature used are indicated in the thesis.

3 Acknowledgements The research presented here would not have been possible without the help of a great number of people. I am grateful for the opportunity to be able to thank a few of them. Primarily I am would like to thank John Leaney, my supervisor, for his tireless support through out the years, his enthusiasm and belief in this work, his guidance in all things, and most especially his patience. He has been a wonderful mentor and is most deeply appreciated. Artem Parakhine, for his encouragement, his support, his input and guidance into the vagaries of both research and research life. John Debenham, my co-supervisor, for his kindness and open supervision, and his determination to keep my research focused. Alcatel-Lucent, for their financial support, and their guidance, without which this research would not have been possible. The University of Technology, Sydney, the Faculty of Engineering and Information Technology and graduate school whose financial support made it possible to complete this research. And finally my Family, Edwin, Robyn, and my sister Clara, whose continued support through the years could always be relied on. iii

4 Contents Abstract x 1 Introduction Managing Complex Telecommunication Services Comprehensive Management Dynamic Market for Service Fulfilment Motivation Vision Research Questions Research Methodology Plan Act Observe and Reflect Implementation Thesis Structure Publications Literature Review History of Network Management Policy based Network Management Systems Service Management Autonomic Network Management FOCALE ANEMA Software Defined Networking Autonomic Systems For Cloud Environments Federated Autonomic Management Cloud Management Inter - Cloud Systems research Market proposals in Management Current Commercial Network and Cloud Resource Management Systems Technologies for implementing management systems Agents in Telecommunications Agents in Cloud Computing Summary System Requirements for a Market based Management System Entities and their Relationships CARMA Entity Goals Contract Specification iv

5 CONTENTS v 3.4 Marketplace Requirements Architecture Development of a Service Architecture New System Requirements for Risk Management Purpose of the SIMS Assumptions and Risks of the CARMA System Summary and Conclusions Model and Design Overview Design and Functionality of the the architecture Bundled Service Provider Bundled Service Agent Service Re-provisioning Composition Single Service Provider Single Service Agent Single Service Resource Provider Single Service Resource Agent Service Provider Composition Information Representation Information Models and Ontologies Contract Transformation through Graph Transformation The Service Information Management System The Dynamic Bayesian Belief Network in the SIMS Performance Judgement in the SIMS Summary Simulation Traditional Network Simulation CARMA Simulation Requirements Agent Based Simulation Design of Simulation Agents Petri-nets Initial Bundled Service Agent Design Statecharts Bundled Service Provider and Agents in the Simulation User Agents in the Simulation Single Service Providers and Agents in the Simulation Single Service Resources in the Simulation Service Information Management System in the Simulation Contract specification and negotiation in the Simulation Other exclusions from the simulation Simulation Study Design and Evaluation Validity of the Case Study Bundled Service Market effect on the Case Study Extension of the Coverage of the Case Study for Simulation Summary Results and Discussion Simulation Detail Overall Goals of the System to be Validated Verification

6 CONTENTS vi Service Recovery Monitoring Messages are correct based on the threshold values Simulation Runs to a Steady State Reasonable Simulation of QoS behaviour Validation Responsibility Reliability and Risk Management Cycle Risk Management Cycle Risk Management Cycle Increased Utilisation Cycle Discussion Conclusions and Future Work Summary Research Questions Answered Original Contributions Future Work Bibliography 139 A Refereed Publications 149

7 List of Figures 1.1 Action Research cycle Strassners Policy Continuum Autonomic Element with MAPE control structure FOCALE s AME with knowledge plane and information model. (Jennings et al., 2007) Reservoir Architectural layers. (Rochwerger et al., 2009) Inter Cloud architecture in a federated cloud.(buyya et al., 2009) Entity Relationship Diagram of the main Entities in CARMA Architecture of the CARMA system View of requirements and affecting factors of Risk Management Whole Service Cycle from the BSP perspective Statechart of the Bundled Service Agent with particular regards to the reprovisioning states Sequence Diagram of contract creation and provisioning by the Bundled Service Agent Reprovisioning Sequence Diagram The architecture and functionality of the Single Service Provider and its agents The architecture and functionality of The Single Service Resource Provider, its agents and its management system The TeleManagement Forum SID Pushout transformations in category theory Graph Transformation Example. (Ehrig et al., 2006) Untransformed Base Graph Graph Transformation Rules Transformed Graph into single services at the BSP - SSP layer More detailed UML SID diagram for the contract at the BSP - SSP layer More detailed UML SID diagram for the contract at the SSP - SSR layer Bayesian Belief Network with no evidence for the purpose of Risk Judgement in Bundled Service Contracts Performance Judgement Algorithm E-Type base graph of Transformations General UML diagram of the SID for a service across all layers Initial agent control devised using petri-nets, top layer Initial agent control devised using petri-nets, bottom layer Equivalent Statechart to the Petri-net of the BSA bottom control State Machine in the Simulation of the BSP control vii

8 LIST OF FIGURES viii 5.5 State Machine in the simulation for the BSA control State machine in the simulation for the BSA single Service Control The state machine for the User Agent The state machine for the Single Service Provider The queuing model for the Single Service Resource Graphical representation of the case study example, showing one user utilising multiple providers in different geographical locations The Map of Single Service Providers in the Simulation, Image taken from (Johnson, 2008) Service fails over from one provider to another on the same node Service Offloading but no failover A selection of messages with colour assignation plotted against the queue size Ratio Of Green to All messages for the first 10 providers Ratio Of Green to All messages for the next 10 providers Yellow messages at High, Medium, Low quality settings Orange messages at High, Medium, Low quality settings Red messages at High, Medium, Low quality settings Initial Budget vs Cost for each BSP Budget vs Cost ratio for one BSP at a sampling ratio of 1 in New reserve sequence Profitability of BSAs under risk management and under minumum cost strategy Percentage of green to overall messages as input to BBN Failure in risk judgement vs no risk judgement (Based on the number of Red messages received) New probabilities for the Risk Of Multiple Contract Failures node New Bayesian Belief Network for contracting new services No of Contracts Failed or Re-provisioned per 1000 contracts Profit Per month at each Quality Level Range of Edge Weightings for Reliable and Unreliable Providers in all Quality Levels No of Contracts Failed or Re-provisioned per 1000 contracts Profit Per month at each Quality Level Profit per month at each Quality Level Utilisation of Traditional usage vs CARMA

9 List of Tables 6.1 The initial system parameters of the Single Service Providers in the simulation The causes of Failure in the Simulation Scaling Factors for edge weights in optimal path algorithm Erroneous BBN results for Edge Corrected BBN results for Edge The number of Total Failures in Each Simulation Run No of Failures in High New initial inputs to Historical Service Performance Node of the BBN No of Re-provisions in High Overall profitability per quality contract ix

10 Abstract The continuing expansion of telecommunication service domains, from Quality of Service guaranteed connectivity to ubiquitous cloud environments, has introduced an ever increasing level of complexity in the field of service management. This complexity arises not only from the sheer variability in service requirements but also through the required but ill-defined interaction of multiple organisations and providers. As a result of this complexity and variability, the provisioning and performance of current services is adversely affected, often with little or no accountability to the users of the service. This exposes a need for total coverage in the management of such complex services, a system which provides for service responsibility. Service responsibility is defined as the provisioning of service resilience and the judgement of service risk across all the service components. To be effective in responsible management for current complex services, any framework must be able to interact with multiple providers and management systems. The CARMA framework proposed by this thesis, aims to fulfil these requirements through a multi-agent system, that is based in a global market, and can negotiate and be responsible for multiple complex services. The research presented in this thesis draws upon previous research in the fields of Network Management and Cloud service management, and utilises agent technology to build a system that is capable of providing resilient and risk aware management of services comprised of multiple providers. To this end the research aims to present the architecture, agent functionality and interactions of the CARMA system, as well as the structure of the marketplace, contract specification and risk management. As the scope and concepts of the proposed system are relatively unexplored, a model and simulation were developed to verify the concepts, explore the issues, assess the assumptions and validate the system. The results of the simulation determined that the introduction of CARMA has the potential to reduce the risk in contracting new services, increase the reliability of contracted services, and increase the utility of providers participating in the market. x